| 摘要 |
PROBLEM TO BE SOLVED: To provide absorbent resin particles showing excellence in gel liquid passing velocity and absorption amount under a load.SOLUTION: The absorbent resin particle contains a crosslinked polymer (A) having an acrylic acid (acrylate) and a crosslinking agent (b) as essential components and smectite (B), and is manufactured by a manufacturing method comprising a process of mixing aqueous dispersions of (A) and (B) and/or a process of subjecting the acrylic acid (acrylate) and the crosslinking agent (b) to polymerization reaction in the presence of the aqueous dispersion of (B). The volumetric average particle diameter of the aqueous dispersion of (B) is 10 to 100 nm. The smectite (B) is preferably at least one selected from the group consisting of hectorite, montmorillonite, beidellite, nontronite and saponite. The content of the smectite (B) is preferably 0.01 to 5 wt.% based on the weight of the acrylic acid (acrylate) and the crosslinking agent (b). The absorption amount of the absorbent resin particles under a load is preferably 15 to 27 g/g, and the gel liquid passing velocity is preferably 30 to 250 ml/min. |
